tính ; 5. 4^15. 9^9 – 4.3^20 . 8^9 phần 5.2^9 . 6^19- 7.2 ^29 . 27^6 23/09/2021 Bởi Aubrey tính ; 5. 4^15. 9^9 – 4.3^20 . 8^9 phần 5.2^9 . 6^19- 7.2 ^29 . 27^6
Đáp án: `(5.4^15 . 9^9 -4.3^20 .8^9)/(5.2^9 .6^19 -7.2^29 . 27^6)=2` Giải thích các bước giải: `(5.4^15 . 9^9 -4.3^20 .8^9)/(5.2^9 .6^19 -7.2^29 . 27^6)``=(5.(2^2)^15 . (3^2)^9 -(2^2).3^20 .(2^3)^9)/(5.2^9 .(2.3)^19 -7.2^29 . (3^3)^6)``=(5.2^30 . 3^18 -2^2 .3^20 .2^27)/(5.2^9 .2^19 .3^19 -7.2^29 . 3^18)``=(5.2^30 . 3^18 -3^20 .2^29)/(5.2^28 .3^19 -7.2^29 . 3^18)``=(2^29 . 3^18 .(2.5-3^2 ))/(2^28 . 3^18 .(5.3-7.2))``=(2^29 . 3^18 )/(2^28 . 3^18)``=(2.1)/(1.1)``=2/1``=2` Bình luận
Đáp án:
`(5.4^15 . 9^9 -4.3^20 .8^9)/(5.2^9 .6^19 -7.2^29 . 27^6)=2`
Giải thích các bước giải:
`(5.4^15 . 9^9 -4.3^20 .8^9)/(5.2^9 .6^19 -7.2^29 . 27^6)`
`=(5.(2^2)^15 . (3^2)^9 -(2^2).3^20 .(2^3)^9)/(5.2^9 .(2.3)^19 -7.2^29 . (3^3)^6)`
`=(5.2^30 . 3^18 -2^2 .3^20 .2^27)/(5.2^9 .2^19 .3^19 -7.2^29 . 3^18)`
`=(5.2^30 . 3^18 -3^20 .2^29)/(5.2^28 .3^19 -7.2^29 . 3^18)`
`=(2^29 . 3^18 .(2.5-3^2 ))/(2^28 . 3^18 .(5.3-7.2))`
`=(2^29 . 3^18 )/(2^28 . 3^18)`
`=(2.1)/(1.1)`
`=2/1`
`=2`